<?php
// +----------------------------------------------------------------------
// | LTHINK [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2015-2016 http://LTHINK.cn All rights reserved.
// +----------------------------------------------------------------------
// | Author: 涛哥 <liangtao.gz@foxmail.com>
// +----------------------------------------------------------------------
// | RenrenSDK.class.php 2013-02-25
// +----------------------------------------------------------------------
use LT\ThinkSDK\ThinkOauth;

class RenrenSDK extends ThinkOauth
{

    /**
     * 获取requestCode的api接口
     * @var string
     */
    protected $GetRequestCodeURL = 'https://graph.renren.com/oauth/authorize';

    /**
     * 获取access_token的api接口
     * @var string
     */
    protected $GetAccessTokenURL = 'https://graph.renren.com/oauth/token';

    /**
     * API根路径
     * @var string
     */
    protected $ApiBase = 'http://api.renren.com/restserver.do';

    /**
     * 组装接口调用参数 并调用接口
     * @param  string $api 微博API
     * @param  string $param 调用API的额外参数
     * @param  string $method HTTP请求方法 默认为GET
     * @return json
     */
    public function call($api, $param = '', $method = 'POST', $multi = false)
    {
        /* 人人网调用公共参数 */
        $params = array(
            'method' => $api,
            'access_token' => $this->Token['access_token'],
            'v' => '1.0',
            'format' => 'json',
        );

        $data = $this->http($this->url(''), $this->param($params, $param), $method);
        return json_decode($data, true);
    }

    /**
     * 合并默认参数和额外参数
     * @param array $params 默认参数
     * @param array /string $param 额外参数
     * @return array:
     */
    protected function param($params, $param)
    {
        $params = parent::param($params, $param);

        /* 签名 */
        ksort($params);
        $param = array();
        foreach ($params as $key => $value) {
            $param[] = "{$key}={$value}";
        }
        $sign = implode('', $param) . $this->AppSecret;
        $params['sig'] = md5($sign);

        return $params;
    }

    /**
     * 解析access_token方法请求后的返回值
     * @param string $result 获取access_token的方法的返回值
     */
    protected function parseToken($result, $extend)
    {
        $data = json_decode($result, true);
        if ($data['access_token'] && $data['expires_in'] && $data['refresh_token'] && $data['user']['id']) {
            $data['openid'] = $data['user']['id'];
            unset($data['user']);
            return $data;
        } else
            throw new Exception("获取人人网ACCESS_TOKEN出错：{$data['error_description']}");
    }

    /**
     * 获取当前授权应用的openid
     * @return string
     */
    public function openid()
    {
        $data = $this->Token;
        if (!empty($data['openid']))
            return $data['openid'];
        else
            throw new Exception('没有获取到人人网用户ID！');
    }

}
